Aquatic Pollution

Author: Edward A. Laws
Publisher: John Wiley & Sons
ISBN: 1119304504
Size: 76.28 MB
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These specific tests are necessary because many of the important effects of
toxicants on organisms, particularly at the sublethal level, do not become
apparent in standard tests to evaluate overall effects. Sublethal Effects
Concentrations of a toxic substance that are insufficient to kill organisms outright
may nevertheless have a devastating effect on the population of the same
organism over a sufficient period of time as a result of sublethal effects. Most
sublethal effects may be classified ...

Toxicological Chemistry And Biochemistry Third Edition

Author: Stanley E. Manahan
Publisher: CRC Press
ISBN: 9781420032123
Size: 26.35 MB
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A number of tests are used to monitor sublethal effects. One such test examines
the induction of mixed-function oxygenase enzymes, which are produced by
organisms to metabolize toxicants. The presence of stress proteins that serve to
repair proteins denatured by toxicants can be evidence of an organism
attempting to cope with sublethal effects of toxicants. The activity of the
acetylcholinesterase enzyme can be measured as evidence of the harmful effects
of organophosphate and ...

Sublethal Effects Of Toxaphene On Daphnids Scuds And Midges

Author: Herman O. Sanders
Publisher:
ISBN:
Size: 55.61 MB
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These concentrations, selected on the basis of the results of the chronic- toxicity
studies, represent the lowest toxaphene concentration that produced an effect on
the organisms and a concentration in which no effect would be expected. ...
CALCULATION OF APPLICATION FACTORS A method proposed by Mount and
Stephen^ for establishing acceptable toxicant limits for aquatic organisms under
continuous exposure conditions was used to calculate an application factor for ...

Los Angeles Wastewater Facilities

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Publisher:
ISBN:
Size: 54.32 MB
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The toxicants considered in this report are trace metals, chlorinated
hydrocarbons, and other potentially toxic substances including phenols and
cyanide. In the concentrations that are legally discharged to the waters of the
Southern California Bight, most of these chemicals cause only sublethal, if any,
effects in the exposed organisms (although direct lethal toxicity occurs to some
benthic organisms exposed directly to sewage sludge). The sublethal effects may
sufficiently alter a ...

Effects Of Pollutants On Aquatic Organisms

Author: Antony Peter Murray Lockwood
Publisher: CUP Archive
ISBN: 9780521211031
Size: 62.43 MB
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Consequently, knowledge about the mode of action of toxicants and causes of
death in poisoned aquatic animals is often lacking. A better understanding of
these mechanisms is necessary if we want to predict the potential harmfulness of
various chemicals to the environment. At our laboratory various means of
investigating sublethal effects of pollutants on aquatic animals are used or are
under development. The different approaches include study of effects on growth,
changes in ...

Aquatic Sciences And Fisheries Abstracts

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Publisher:
ISBN:
Size: 31.34 MB
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Crangon cranoon 16578 detergents, moulting, survival, enzymatic activity,
hepatopancreas. pollution Crangon crangon 16622 i. sublethal effects, <
detergents, sublethal effects, Crangon crangon 24878 dyes, textile dyes,
mdustnai wastes. Channa punctatus 13461 embryos, sporophytes. hydrazine.
Cystoseira, Sargassum 145 enzymatic acbvrty. Cholinesterase inhibitors,
pesticides, iuveniles. Aopensendae 1667 experimental research, models,
aquatic animals, toxicology 20763 fish ...

Environmental Chemistry Eighth Edition

Author: Stanley E. Manahan
Publisher: CRC Press
ISBN: 9781566706339
Size: 78.93 MB
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Botulinus toxin ^ -iOr5 a Doses are in units of milligrams of toxicant per kilogram
of body mass. Toxicity ratings ... Estimated LD50 values for substances on the left
have been measured in test animals, usually rats, and apply to oral doses. b B/s(
2-ethylhexyl)phthalate. c Tetraethylpyrophosphate. " Toxin from ... Irreversible
effects of exposure remain after the toxic substance Exposure to toxicant L
Reversible Irreversible Effect Sublethal effect -Margin TOXICOLOGICAL
CHEMISTRY 635.

National Ocean Pollution Program Federal Plan For Ocean Pollution Research Development And Monitoring

Author:
Publisher:
ISBN:
Size: 67.72 MB
Format: PDF
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Priority Issue: Relationship Between Exposure and Effects of Toxic Material (
Including Complex Mixtures) on the Most Sensitive Life-Stages and Population
Dynamics of Aquatic Organisms Information Need: Sublethal Effects of Toxic
Substances, Especially with Regard to the Relationship Between Effects on
Individuals and Integrity of Populations. The description and prediction of
adverse health and environmental effects caused by toxic substances are a
generally complicated and ...

Federal Plan For Ocean Pollution Research Development And Monitoring

Author:
Publisher:
ISBN:
Size: 38.42 MB
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Priority Issue: Relationship Between Exposure and Effects of Toxic Material (
Including Complex Mixtures) on the Most Sensitive Life-Stages and Population
Dynamics of Aquatic Organisms Information Need: Sublethal Effects of Toxic
Substances, Especially with Regard to the Relationship Between Effects on
Individuals and Integrity of Populations. The description and prediction of
adverse health and environmental effects caused by toxic substances are a
generally complicated and ...